Oil-burner



W. R. RAY.

OIL BURNER.

APPucAnoN min Nov. 30. |914.

2 SHEETS-SHEET l.

Maa

Patented Aug. 8, 1916.A

W. R. RAY.

OIL BURNER.

APPLICAUON FILED Nov. 30. 1914,

1,1 93,8 1 9. Patented Aug. 8, 1916.

2 SHEETS-SHEET 2- I'lYIuSICN: INVEST() WILLIAM R. RAY, OF SAN FRANCISCO, CALIFORNIA.

OIL-BURNER.

Specification of Letters Patent.

Patented Aug. 8, 1916.

Application led November 30, 1914. Serial No. 874,754.

To all whom it may concern.'

Be it known that I, WILLIAM R.' RAY, a citizen of the United States, residing in the city .and county of San Francisco and State of California, have invented new and useful Improvements in Oil-Burners, of which the following is a specification.

This invention relates to oil burning apparatus and especially to an apparatus for atomizing crude oil and discharging it with a lineal blast into a fire box.

It is an object of this invention to provide in one complete unit a rotary atomizer, an air pump and a motor with but one moving component; and particularly to provide an oil burner whereby a quantity of crude oil is atomized and then directed in a substantially lineal or axial direction; and to provide a centrifugally acting nozzle and means for discharging a blast of air at an angle to the discharge from the nozzle so as to catch the spray and carry it in a slightly flaring manner to produce a long blast.

Another object is to provide an oil burner as free from friction as possible and thus being economical in the consumption of power per hour per gallon-of oil consumed.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which- Figure 1 is a central vertical longitudinal section of the device. Fig. 2 is a detail of the air damper. Fig. 3 is a plan showing installation.

2 indicates a comparatively thin, circular casing of suitable diameter, with an inner partition 3 forming a chamber 4 in which turns a centrifugal fan or pump runner 5, the discharge from which flows centrally in the space 6 behind the partition 3. The air discharges outwardly through an annular, axial mouthpiece 7 on the back or furnace side of the casing.

The front of the casing has a central inlet opening 8 fitting the hollow inlet hub of the fan 5, which is secured on the shaft 9 of a suitable power generator, as a motor 10, secured on the casing. Secured to the rotor 5, or its shaft, is a stemmed cup 11 flaring outwardly and with its edge a proximate to the edge' b of the air mouth or nozzle 7. The cup bottom is perforated at 12 and has .a rear overhanging angular flange 13. ProJecting into the flange 13 of cup 11 is an oil feeding tube 14 connecting with a duct l5 in the casing and to which oil is led from a suitable source.

From the foregoing description of the structure it will be seen that the device involves but one moving component, including the oil cup, the rotor and the motor Shaft, moving as an integer with friction only in the motor bearings, thus being very economical in the consumption of power.

The burner casing has at one Side a hinge 2 for attachment to the wall of the furnace A, Fig. 3, so that the whole device may be swung away from the furnace front, providing for ready access, cleaning and removal of the mouthpiece and cup when necessary. Any suitable shutter 8 may be used for regulating the inlet of air.

In operation, oil is fed to thel casin duct 15 and drips into the cup nozzle 11. Vhen the motor is energized it drives the rotor 5 at high speed and discharges a blast of air in a thin annular stream from the mouth around the circumference of the oil nozzle 11. The oil in the rotating cup advances to its edge a and is thrown centrifugally against the surrounding stream of air moving at a right angle to the edge of the cup and hence across the oil spray. Thus the oilis picked up by the air and carried into the furnace in a flame which is slightly divergent as it leaves the nozzle. This produces a column or pillar of fire axial with the burner.

This burner is of lcw construction and operating cost, has but one moving element with only two bearings, each part is simple and replaceable at small expense, is easy to maintain and keep clean, is very compact and forms a complete power and burner unit, the life of which is practically unlimited; the only parts subject to heat action being the mouthpiece and the cup nozzle.

By Vproviding a fan'or runner 5 of a d1- ameter relatively large as to that of the spray nozzle 11, a pressure of air is attained at the mouthpiece which is not only effective to atomize the oil, but also forces the combustible mixture in an axial direction in front of the burner and in a slightly conical form.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. An oil burner comprising a casing having a restricted tubular discharge nozzle, a

rotatable blower mounted in the casing forimpelling air through the nozzle, an oil spraying nozzle rotatable in the discharge nozzle of the casing and having a threaded stem for securing the spraying nozzle to the blower for rotation therewith, said spraying nozzle comprising a cup provided with a rearwardly projecting flange of angular section overhanging the stem and a circular series of perforations provided in the bottom of the cup for establishing communication between the interior of the cup proper and its rear flange, and an oil supply pipe fixed in the casing and projecting into the flange of the cup for feeding oil thereto.

2. An oil burner comprising a casing having a restricted tubular discharge nozzle, a rotatable blower mounted in the casing for impelling air through the nozzle, an oil spraying nozzle comprising astemmed cup mounted for rotation by the blower and a rearwardly extending flange overhanging the stem and provided with an inwardly proj ecting annular flange having a central opening surrounding the stem, the bottom of the cup having a series of perforations arranged in proximity to the inner side wall of the cup, and an oil supply means arranged to discharge oil in the flange of the cup.

3. An oil burner comprising a casing hav'- ing a restricted tubular discharge nozzle, a rotatable blower mounted in the casing for impelling air through the nozzle, an oil spraying nozzle comprising a cup having a perforated bottom carrying a stem secured to the blower for rotation therewith and a rearwardly extending flange overhanging the stem, and a pipe for delivering oil into the flange, and through the perforated cup bottom for deliverance in a centrifugal manner into the surrounding air jet.

4. In an oil burning apparatus, a casing having a nozzle, an oil spraying cup rotatable within the nozzle, and provided with a plurality of perforations in its bottom only, means for rotating the cup and supplying air for the nozzle, and means for supplying oil for passage through the perforations of the cup and discharge from the latter.

.5. A direct jet oil burner, including a circular revoluble cup with imperforate sides andpperforated bottom, and a fianged extension beyond the bottom, means to deliver oil through the fiange and bottom, to be discharged centrifugally over the edge of the cup, a tube concentrically surrounding the cup, a casing from the side of which the tube projects, a pump runner revoluble within the casing in unison with the cup, and a ter than the extension and forming therewith an open ended annular channel, means supported by the casing to introduce and distribute oil in the bottom of the cup, and a centrifugal fan with central air admission passages at one side of the casing and peripheral discharge to the other side of the diaphragm, leading to the casing extension and producing a substantially annular blast of air transversely of the centrifugal oil discharge.

7. A centrifugal oil burner comprising in combination a motor and a motor shaft, upon which is mounted a fan of relatively large diameter with respect to its width, a fan casing, said casing having a nozzle in axial line with, and surrounding and spaced from, said shaft, said casing having a diaphragm between the fan and nozzle around which the air travels in a relatively thin sheet to the nozzle, an oil distributing cup on the end of the shaft within said nozzle, means to deliver oil to the cup, the air passing through the nozzle having a thin cylindrical discharge substantially coaxial with the oil cup and intercepting the centrifugally discharging oil from the cup, substantially as described. f

8. In an oil burner, a gradually tapering air nozzle, a gradually Haring cup arranged within the nozzle and extending a distance therein to form with the nozzle a comparatively long annular air passage which gradually decreases in area toward the contracted end of the nozzle, the latter closely surrounding the cup whereby a thin sheet of air will issue from the annular passage provided', oil supply means for the cup, and air supply means comprising a casing supporting the nozzle, and a, blower of large diameter arranged within the casing and provided with narrow blades of small area whereby a small volume of air under high pressure is obtainable.

9. In an oil burner, an air nozzle, an oil spraying nozzle rotatable in the air nozzle and comprising a cup havinga rearwardly extending flange, and means for supplying oil to the flange for delivery to the cup.

10. In an oil burner, an air nozzle, oil spraying means rotatable therein and comprising a cup having a rearwardly extending flange communicating with the cup, and a delivery pipe having its delivery end deected and extending into the flange of the cup for supplying oil thereto.

11. In an oil burner, an air nozzle, oil spraying means rotatable therein and comprising a cup having a rearwardly extending flange communicating with the cup, said flange being angular in cross section, and an oil pipe terminating within the flange for delivering oil therein.

12. The combination 1n an oil burner, of

an open mouth cup having unperforated side walls, and an oil supply through the bottom, a circular casing having a nozzle extending from one side, axial with and inclosing the cup, and forming therewith a long narrow convergent annular channel, an air blower within the casing with narrow blades of small area, and a shaft upon which both cup and blower are xed to rotate in unison, said blower having a diameter which will discharge air under sufiieient pressure to divert the centriugally discharged oil into the line of travel of the air.

13. An oil burner including an open mouth oil cup with closed sides and an oil supply through the bottom, a blower fixed to the shaft of and revoluble in unison with the oil cup, a casing for the blower, an extension nozzle inclosing the cup, and forming therewith a long convergent annular channel, said casing having a passage oonnecting the exterior of the blower case with the said channel to discharge a tubular blast across the path of the eentrifugally discharged oil.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

WILLIAM R. RAY. Witnesses:

STANISLAUS A. RILEY, JAMES T. MCCUE. 

